Which phenotypes are selected against?

What is a selected phenotype?

Phenotypic selection occurs when individuals with certain characteristics produce more surviving offspring than individuals with other characteristics. … Phenotypic selection occurs when individuals with different characteristics (i.e., different phenotypes) differ in their survival, fecundity, or mating success.

How are phenotypes chosen?

Natural selection can act on traits controlled by many genes

In some cases, different phenotypes in a population are determined by just one gene. … Such phenotypes are often called polygenic traits, and they typically form a spectrum, taking many slightly different forms.

When the most extreme phenotypes are selected against this is called?

disruptive selection. selection that occurs when both extreme phenotypes are favored are favored, while individuals with intermediate phenotypes are selected against.

What are the three types of selection?

The 3 Types of Natural Selection

  • Stabilizing Selection.
  • Directional Selection.
  • Disruptive Selection.

What is selected during natural selection?

What is “selected” during natural selection? Explain your answer. Individuals with certain advantageous traits are selected, in the sense that they produce the most offspring. Different species have traits that increase fitness in a particular environment.

Which best describes directional selection?

Directional selection occurs when phenotypes at both extremes of the phenotypic distribution are selected against.

Does natural selection only act on phenotype?

The physical characteristics are called the phenotype; therefore, natural selection works directly on phenotype. The phenotype of an organism is determined by both environmental influences and genotype.

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Why do we have different phenotypes?

The importance of the environment can be seen from the phenomenon of the norm of reaction. The same genotype, when raised in different environments results in different phenotypes. Furthermore, different genotypes respond to the same environmental changes differently from each other.